TM 10-4520-262-12&P                                                     0009 00 0009 00-2 Table 1. Operator Troubleshooting Procedures MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION 1. Heater Fails to Start. Step 1.  Has the green ON/ON-HOLD light been lit for more than 3 minutes but the heater has still not started?   System could be in post purge mode. Allow up to 10 minutes before placing the ON/OFF switch in the OFF position and notify unit maintenance. Step 2. Does the ON/ON-HOLD advisory light come on momentarily but shut down followed by the system fault light flashing? Count the number of times the System Fault light flashes as well as the number of audible tones heard. Record the number of times the system fault advisory light flashes and refer to the troubleshooting instructions later in this section for that specific fault code. Step 3.  Check to make sure that the in- tent controller cable is securely connected to the in-tent controller and to the control connector at the lower housing. Make sure that the in-tent controller cable is securely connected to the control connector located on the lower housing.   Step 4.  Remove fuses from battery pack. Visually inspect the element inside the fuse to ensure both fuses are in good condition. If the fuse(s) is/are bad or if in doubt, replace bad fuse(s) with spare fuse(s) located behind duct adapter at heater inlet assembly.   Step 5. Is the battery pack connector securely engaged in the connector on the lower housing? Make sure that the battery pack connector is securely engaged in the connector on the lower housing. Make sure connector locks in place. 2. Heater smokes continuously during operation Step 1. Check to make sure that vent openings on front of combustion air inlet cover are clear of snow or other obstructions. Clear combustion inlet area of snow or any other obstructions.   Step 2.  Check to make sure that combustion exhaust pipe is clear of snow or other obstructions. Clear combustion exhaust pipe area of snow or any other obstructions. Step 3. Check that the correct fuel being used for the outside temperature where the heater is being operated. Refer to WP 0001 00, Table 3. Approved Fuels At Various Temperatures. Verify that fuel being used is appropriate for the temperature in which the heater is operating.